Armature-winding for induction-motors.



No. 706,632. Patented Aug. l2, I902.

' A. H. ARMSTRONG. ARMATUBE WINDING FORIN DUCTIDN HUTURS. (Application filed Jan. 17, 1901. (No Model.)

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UNITED STATES,

PAT T OFFICE.

ALBERT H. ARMSTRONG, OF SOHENECTADY, NElV YORK, ASSIGNOR TO GENERAL ELECTRIC COMPANY, A CORPORATION OF NEIV YORK.

ARMATURE-WINDING FOR INDUCTION-MOTORS.

SPECIFICATION forming part of Letters Patent No. 706,632, dated August 12, 1902.

Original application filed November 3, 1897, Serial No. 657,229. Divided and this application filed January'17, 1901. Serial No. 43,615, (No model.)

To a whom it may concern: 7

Be it known that I, ALBERT H. ARMSTRONG, a citizen of the United States, residing at Schenectady, county of Schenectady, State of New York, have invented certain new and useful Improvements in Armature-windings for Induction-Motors, (Case No. 2,037,) of which the following is a specification, this application forming a division of my prior application filed November 3, 1897, Serial No. 657,229.

In certain kinds of induction-motors squirrel-cage armatures are employed, comprising a number of copper bars extending parallel with the shaft and soldered to rings at each end, which connect them in closed circuit relation. The heating of such an armature is limited to the melting-point of the solder used in its construction.

My invention has for its objects to decrease the labor of construction and to provide an armature in which no solder is used and which will stand overheating up to the melting-point of copper without being destroyed.

In the accompanying drawings, Figure 1 is a perspective View of a spider and core with one of my improved windings partially applied thereto. Fig. 2 is a plan View, and Fig. 3 is a detail, of the joint between the ends or sections of the winding.

Mounted on the shaft A is a spider B, comprising a hub and a number of radial arms connected at their outer ends to a cylinder 0, which forms a support for the core D, provided with teeth d.

The armature-winding consists of a metal grid composed of a' plurality of parallel flat bars E, arranged side by side at the same distance apart as the slots between the teeth in the core D. The depth of the bars is preferably the same as that of the slots, and the ends of the bars are connected by intermediate flexible fiat portions or webs E E cast integral therewith, perpendicular to the bars E. The distance between the inner edges of the webs is substantially the same as the Width of thecore-teeth. The bars E constitute thearmature-conductors, and the webs .4 E the end connections.

lengths and readily cut to fit any machine.

A number. of windings of this character can be made and kept in stock and may be applied to armatures having different diameters. It is preferable to make a winding of this character in a single piece in order to reduce the joints; but for large armatures the winding may be made in several sections and the sections fastened together.

By the construction above described I am enabled to dispense with the binding-bands commonly employed, and the labor of assembling is greatly decreased.

What I claim as new, and desire to secure by Letters Patent of the United States, is-

1. An induction-motor winding comprising a plurality of conductors united at their ends by webs integral therewith, the said winding being adapted to be wrapped around an armature-core and secured thereon.

2. As an induction-motor winding, a castmetal grid comprising a plurality of conductors united by web connections at their ends, the said winding being adapted to be wrapped around an armature-core and secured thereon.

3. An induction-motor winding comprising a plurality of parallel bars connected at their ends by flexible integral intermediate portions.

4:. An induction-motor winding comprising a plurality of parallel bars arranged side by side and connected at their ends by flexible integral webs arranged perpendicular to said bars.

5. In combination, a core comprising a body of toothed laminae, a grid, constituting a closed-circuited winding, comprising a pluthe said grid being composed of parallel bars adapted to fit between the teeth of the core and connected by intermediate portions arranged to lie against the ends of the core.

In witness whereof I have hereunto set my I hand this 16th day of January, 1901.

ALBERT H. ARMSTRONG.

WVitnesses:

l BENJAMIN B. HULL,

MARGARET E. WOOLLEY. 

